
package botlab.compiler;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

/**
 *
 * @author Quentin
 */
public class ClassPathHacker
{

    private static final Class[] parameters = new Class[]
    {
        URL.class
    };

    public static void addFile(String s) throws IOException
    {
        File f = new File(s);
        addFile(f);
    }
    
    public static void addFile(File f) throws IOException
    {
        addURL(f.toURL());
    }

    public static void addURL(URL u) throws IOException
    {

        URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
        Class sysclass = URLClassLoader.class;

        try
        {
            Method method = sysclass.getDeclaredMethod("addURL", parameters);
            method.setAccessible(true);
            method.invoke(sysloader, new Object[]
                                    {
                                        u
                                    });
        } 
        catch (Throwable t)
        {
            t.printStackTrace();
            throw new IOException("Error, could not add URL to system classloader");
        }

    }
    
    public static void printClassPath()
    {
        ClassLoader cl = ClassLoader.getSystemClassLoader();
 
        URL[] urls = ((URLClassLoader)cl).getURLs();
 
        for(URL url: urls){
        	System.out.println(url.getFile());
        }
    }
}
